mount$9p_fd(0x19e3, &(0x7f0000000040)='./file1\x00', &(0x7f00000000c0), 0x0, &(0x7f0000000400)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {'wfdno', 0x3d, r1}, 0x2c, {[{@cache_mmap}, {@cache_fscache}, {@debug={'debug', 0x3d, 0x924}}, {@nodevmap}, {@noextend}, {@dfltgid}, {@afid={'afid', 0x3d, 0x345}}]}})
BUG: memory leak
unreferenced object 0xffff888046ec9ac0 (size 32):
  comm "syz-executor.7", pid 67777, jiffies 4296584016 (age 23.123s)
  hex dump (first 32 bytes):
    39 70 2d 66 63 61 6c 6c 2d 63 61 63 68 65 2d 37  9p-fcall-cache-7
    34 35 00 46 80 88 ff ff 00 00 00 00 00 00 00 00  45.F............
  backtrace:
    [<00000000c14fea09>] kstrdup+0x36/0x70 mm/util.c:60
    [<000000005ea228a1>] kstrdup_const+0x53/0x80 mm/util.c:83
    [<000000007ea288f1>] kvasprintf_const+0x10c/0x1a0 lib/kasprintf.c:48
    [<00000000d8274b60>] kobject_set_name_vargs+0x56/0x150 lib/kobject.c:297
    [<00000000bc1f201d>] kobject_add_varg lib/kobject.c:392 [inline]
    [<00000000bc1f201d>] kobject_init_and_add+0xc9/0x160 lib/kobject.c:481
    [<000000000b6c2a8c>] sysfs_slab_add+0x172/0x200 mm/slub.c:5626
    [<000000003ad3b3bb>] __kmem_cache_create+0x3db/0x520 mm/slub.c:4445
    [<00000000fc87a35c>] create_cache mm/slab_common.c:255 [inline]
    [<00000000fc87a35c>] kmem_cache_create_usercopy+0x1db/0x2f0 mm/slab_common.c:350
    [<00000000b8a98265>] p9_client_create+0xc6a/0x1230 net/9p/client.c:1074
    [<00000000c0590099>] v9fs_session_init+0x1dd/0x1680 fs/9p/v9fs.c:406
    [<0000000030a57eb5>] v9fs_mount+0x79/0x8f0 fs/9p/vfs_super.c:126
    [<00000000bd07f178>] legacy_get_tree+0x105/0x220 fs/fs_context.c:593
    [<000000006452e68c>] vfs_get_tree+0x8e/0x300 fs/super.c:1572
    [<00000000c563dfcd>] do_new_mount fs/namespace.c:2918 [inline]
    [<00000000c563dfcd>] path_mount+0x1429/0x2120 fs/namespace.c:3248
    [<0000000063cf7812>] do_mount fs/namespace.c:3261 [inline]
    [<0000000063cf7812>] __do_sys_mount fs/namespace.c:3469 [inline]
    [<0000000063cf7812>] __se_sys_mount fs/namespace.c:3446 [inline]
    [<0000000063cf7812>] __x64_sys_mount+0x282/0x300 fs/namespace.c:3446
    [<000000003ab36c84>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46

BUG: leak checking failed